v. Noorden: “Die Zuckerkrankheit,” fourth edition; and “Pathologie des Stoffwechsels,” fourth edition, vol. i. By a series of experiments on a number of healthy American soldiers, continued for a long time, Chittenden[256] and Horace Fletcher[257] found that these men could do very hard work with an average of only 55 grammes albumin and 2700 calories; and, what is more interesting, their muscular power was doubled. Footnote 256: Chittenden: “Physiological Economy of Nutrition,” New York, 1904, and “The Nutrition of Man,” London, 1907. Footnote 257: H. Fletcher: “The A, B-Z of Nutrition,” New York, 1904. The same result was obtained by Professor Chittenden by experiments on seven of the finest athletes among the 2300 students of Yale University. He found the strength of these students increased as much as 48 per cent. One of them won the championship in gymnastics, open to all American universities, during the course of these experiments. Rechenberg found that the weavers of Zittau in Germany required 65 grammes of proteids a day. Very interesting are the observations of Professor Baelz, of Tokio, made on the Japanese coolies, who drew the jinrickshaw containing Professor Baelz, who then weighed 160 pounds. These coolies took carbohydrates, mainly rice, with a proteid content of only 60 to 80 grammes. They were able to do their work exceedingly well on this meager diet. One day Professor Baelz gave them a little meat which they took for three days, and then refused it, saying they would take it after their journey was done. Baelz made the interesting observation that these men were able to go about 60 miles, drawing a man of 108 pounds, whereas Baelz, who followed riding in a carriage, had to change his horse six times and only beat them by half an hour. The author of this book has observed that while taking 1½ liters of milk a day, 2 eggs, 40 grammes of butter, 3 rolls, 3 oranges, a pound of cherries, a cup of coffee with milk, and one tart, he was able to live very well for about two months without any loss in weight. The milk was of excellent quality, containing about 700 calories to the liter, and about 34 grammes albumin; thus he was taking about 70 grammes albumin and about 2300 calories a day, with a bodyweight of 155 pounds, and leading a very active life and he felt better than ever before.